package com.dqj.map;

import java.util.HashMap;
import java.util.Random;

public class Exp1 {    
    public static void main(String[] args){    
         HashMap h1=new HashMap();    
         Random r1=new Random();        
         for(int i=0;i<1000;i++){    
              Integer t=new Integer(r1.nextInt(20));    
              if(h1.containsKey(t))    
                   ((Ctime)h1.get(t)).count++;    
              else   
                   h1.put(t, new Ctime());    
         }    
         System.out.println(h1);    
    }    
}    
  
class Ctime{    
    int count=1;    
    public String toString(){    
         return Integer.toString(count);    
    }    
}   
